Improved spking-bed bottom



-TO ALL WI-IOM IT MAY CONCERN:

LEWIS ll.. BRADBURY, 0F CHriRL'ES'IOWN,` MASSACHUSETTS.

Letters .Patent No. 76,295, dated April 7, 1868.

IMPROVED SPRING-BED BOTTOM.

'tlgevtlgetule nitriet tu im tlgese etters rctcnt mit making intl nttige rame.

Be it known that I, LEWIS It. BRADBURY, of the city of Charlestown,county of Middlesex, and State of Massachusetts, have invented anew anduseful Improvement in Spring-Beds; and I do hereby declare that thefollowing isla full, clear, and exact description ofthe same, reterencebeing had to the accompanying drawing, in whieh- Figure 1 represents a.top view, and

Figure 2 a section through :1: fr, lig. 1.

My invention relates to that class of spring-beds in which the spring isplaced at each end of the bed, and is designed tp overcome many of thedifficulties hitherto experienced, and common to the beds made in' thisway; the o bjeet being to produce a spring which shall be easily andcheaply made, durable, not easily broken, and which shall bear handlingwithout injury.

In the drawing, A represents the frame of the bed; BB being the endrails, into which the ends of the spring C are fastened, by being driveninto the rail, and secured by a staple, the other end oi the spring,upon which the slats D rest, being held in place by the cleat E. Underthe spring C,`and resting on the rail B, I place an additional spring,1I, so that, when the spring C is depressed, instead of resting on therail, the pressure is received by this spring, and the durability of thespring C is increased. This spring II may be a.

strip ot vulcanized rubber, or a slat, having spiral spring at eaclrend.In the drawing it is shown as made ot" rubber, and I consider this theinost desirable mode of making it.

The springt] is a. compound or double-acting spring, having a doublespiral, F, in the centre of its length, which gives it the necessaryiexibility. Y V

The spiral spring Gr may be used, if required, in the position shown, togive the slats greater' strength, and to keep them from bending underthe weight of the bed. e

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The combination ofthe spring C, made substantially as shown, with thespring H, placed under it, the two springs operating together, for thepurpose substantially as set forth.

. L. Il. BRADBURY.

Witnesses:

P. H. HUreHIiisoN, K. W: BAKER.

